.student-content {
    width: 90%;
    margin:0 5% 0 5%;
}
.system-name {
    text-align: center;
}
hr {
    margin-bottom: 20px;
}
.system-content{
    display: flex;
    justify-content: space-around;

}
.select-course-box {
    display:flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    width: 400px;
    height: 827px;
    left: 77px;
    top: 100px;

    background: #91ccff;
    border-radius: 69px;
}
.list {
    width: 300px;
    height: 234px;
    left: 125px;
    top: 235px;

    background: #C4FFFC;
    border-radius: 10px;
}
.list-content{
    width: 300px;
    height: 234px;
    left: 125px;
    top: 235px;
    border: none;

    background: #C4FFFC;
    border-radius: 10px;
}
.query-course{
    display:flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    width: 400px;
    height: 827px;
    left: 77px;
    top: 100px;

    background: #91ccff;
    border-radius: 69px;
}
option{
    width: 300px;
    height: 70px;
    font-size: 20px;
    background: #0fc8ff;
    text-align: center;
    line-height: 100px;

}
button{
    width: 200px;
    height: 80px;
    left: 221px;
    top: 830px;
    font-size: 33px;
    background: #7fb9d5;
    border-radius: 10px;
}
.box {
    width: 300px;
    height: 70px;
    font-size: 20px;
    background: #0fc8ff;
    text-align: center;
    line-height: 100px;
}